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Re: [PATCH] change default --format from gnu to posix

From: Paul Eggert
Subject: Re: [PATCH] change default --format from gnu to posix
Date: Sat, 11 Dec 2021 18:56:04 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.3.1

On 12/10/21 20:31, Mike Frysinger wrote:
i think the take away is that GNU tar moves the ecosystem.  if it changed
its default to pax, then projects would be more incentivized to update.

Yes, it's the classic chicken-and-egg problem.

Something along the lines of patch 1/2 looks OK, though the test for the warning looks backwards: shouldn't the warning be issued when the builder uses the release default instead of when the builder overrides the default?

As for patch 2/2, I expect that we'd need to give distros more warning that this time we really mean it; we can't just flip a switch. That is, if we're going to do this at all (I'd certainly like Sergey's opinion here).

Have you changed Gentoo's build procedure to configure 'tar' with './configure DEFAULT_ARCHIVE_FORMAT=POSIX' when it builds 'tar'? If not, I suggest doing that, and then reporting back after the revised 'tar' has been used by a significant number of Gentoo users. That will help build a case for making the proposed change.

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